<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="信息描述">
        <el-tag type="info">excel模版说明</el-tag>
        <el-tag>
          <i class="el-icon-download"/>
          <a :href="'/static/01.xlsx'">点击下载模版</a>
        </el-tag>

      </el-form-item>
<!-- ref 组件唯一标识  
    :auto-upload 是否自动上传
    :auto-upload 当按钮被点击一次后不能再被点击第二次
    limit 限制每次只能传输一次文件
 -->
      <el-form-item label="选择Excel">
        <el-upload
          ref="upload"  
          :auto-upload="false"
          :on-success="fileUploadSuccess"
          :on-error="fileUploadError"
          :disabled="importBtnDisabled"
          :limit="1"
          :action="BASE_API+'/taxation/subject/addSubject'"
          name="file"
          accept="application/vnd.ms-excel">
          <el-button slot="trigger" size="small" type="primary">选取文件</el-button>
          <el-button
            :loading="loading"
            style="margin-left: 10px;"
            size="small"
            type="success"
            @click="submitUpload">上传到服务器</el-button>
        </el-upload>
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
export default {
    data() {
        return {
            BASE_API: process.env.BASE_API, // 接口API地址
            importBtnDisabled: false, // 按钮是否禁用,
            loading: false  // 不自动加载表单
        }
    },
    created() {
        
    },
    methods: {
        // 点击按钮上传文件到接口里面
        submitUpload() {
            this.importBtnDisabled = true
            this.loading = true
            this.$refs.upload.submit()
        },
        // 上传成功
        fileUploadSuccess(response) {
            // 提示信息
            this.loading = false
            this.$message({
                type: 'success',
                message: response.message
            })
            // 路由跳转到课程分类列表
            this.$router.push({path:'/subject/table'})
        },
        // 上传失败
        fileUploadError() {
            this.fileUploadBtnText = '导入失败'
            this.loading = false
            this.$message({
                type: 'error',
                message: '导入失败'
            })
        }
    }

}
</script>

